Valve-disk.



GEORGE HART, OF WILLIAMSPORT, FENNSYLVANIA.

, VALVE-DISK.

Specification of Letters fatent.

Patented Sept. 2, 1013.

Application filed .Tune 13, i912. Serial No. 703,403.

To @ZZ wlw/1n t may] concern:

Be it known that I, GEORGE HART, a citizen of the United States of America, residing at Williamsport, count-y of Lycoming, State of Pennsylvania, have invented certain new and useful Improvements in Valve- Disks, of which the following is a specification.

This invention relates to a composite disk which is particularly adapted for use as a floating disk in valves, though it may be otherwise applied.

In various localities the water contains a large percentage of sulfur and other soluble compounds which attack metal. rIhe water and other liquids handled in various manufacturing processes have similar properties. The floating disks, of the nature to which this invention relates, are interposed directly in the path of the stream, and often the liquid impinges against the bottom face of the disk with great force. Under these circumstances, a prolonged flow of water thus charged, and liquids having similar corrosive properties, will, in a short time wear away the bottom surface of the metal valve disk so that it soon becomes inoperative to close tightly the valve opening.

Numerous valves have been constructed consisting of a metal disk in which a rubber ring is inserted, but the action of the liquid is frequently suthcient to remove enough of the metal to unseat the ring. The abrasive action of the valve seat upon the disk is also greatly increased by this chemical action.

Various organic materials, as rubber, asphalt, and the like, are not attacked by the chemical compounds to which I refer, such materials are herein designated as resistive materials, but a disk made of the softer organic compounds has not sufficient rigidity to make a tight closure at the excessive hydraulic pressures which are frequently employed, and the various hard, organic materials, as hard rubber and the numerous substitutes, are so brittle and friable, that they crack when pressed tightly against the seat.

The object of the present invention is to provide a valve disk of sufficient strength to withstand the stress applied to it when it forced against the valve seat in closing the valve against high pressures, and at the same time having a face, which is exposed to the action of the current, composed entirely of resilient, organic, or other resistive material., that is, material which is not acted upon by the various sulfur and other similar soluble compounds. '.lherefore I make my valve disk with a metal Spud or frame to receive the pressure of the valve stem, and a body or bottom disk of organic or resistive material to be opposed to the liquid current and to contact with the seat, the metal spud which receives the pressure of the stem serving' to distribute the stress over the organic body and thereby press the organic material against the seat at all points, and, at the same time, to prevent cracking of the body, vf. c., the organic material.

In its preferred form the valve disk consists of a metal spud or top disk and a body or bottom disk of organic material, the spud being embedded in the top face of the body and interlocked therewith. I thus have a valve disk with a metal top face and a bottoni 'tace of organic material. Preferably, to improve the interlocking action and make it substantially impossible to separate the metal from the rubber, I form the spud or top disk with its edges beveled or inclined inward toward the top, so that there is in eft'ect a dove-tailed connection between the metal and the organic material.

In the accompanying drawings I have illustrated my invention in the mostl practical form in which it has been produced up to the present time.

Figure l is a vertical, central cross-section of a hydraulic valve provided with a iioating disk constructed in accordance with my invent-ion. Fig. 2 is an elevation of the disk. Fig. 3 is a top plan of the same. Fig. 4t is a vertical, central section on the line 4t, 4t, Fig. 3. Fig. 5 is a top plan view of the spud or metal disk.

rllhe valve shown in Fig. l consists of a chamber or body portion 2 divided by means of an internal wall 3, pierced by a vertical aperture 4, surrounded by an upwardly disposed seat 5. There is the usual bonnet threaded at 7 to engage a threaded bonnet opening S in which it is seated. 'lhe bcnnet has a central, vertical opening f). threaded to receive the valve stem l0 which is correspondingly threaded, and the stem is provided at its lower extremity with a depending disk box 11. shown as integral with the stem and having openings il at the sides. In the form shown, the disk box is provided with a central convexity at 12. This is t0 bear upon the top surface ot the valve disk as hereinater described.- l A n 1Within the boX 11 is the valve disk 14 of a diameter slightly greater than the valve seat. This disk is mounted to float, that is, it is tree to move up and down in the box relatively to the seat. The iioW through the valve is iii the direction of the arrow, c'. e., from right to left and upward through the seat, the liquid on the iight side of the valve being" under pressure. It the stein is slightly Withdrawn, z'. e., unsereived, the pressure being removed from thetop" of the valve disk, the liquid forces the disk upward and passes onward through the valve chain-v ber. It for any reason back pressure' oe` v curs, the disk drops to its seat and' closes the valve, and to this extent it acts as a check valve.

The disk 14, shown in Figs. 2', 3, 4 and 5', consists of a top' disk, sp'ud or traine 15 ot metal, in its preferred form, having its n single eiiibodiine'iit of myinvention in order edges beveled at 1G and inclined. init/arditi"- ivard the top sufi-tafee, anda body or bottom disk 17 of resilient, organic or resistive ma- L y herein' are used in their descriptive rather teriail, as rubber,- asplialt, 0r the like, the

s'piid or trame being` seated in the bod5'f, p K y ture's` of the devicel iii-ay be Widely variedl vvith'out departure from the' principlev of my forming' a valve disk with a metal top or bearing surface, and a bottom or seating surface, to be opposed to the liquid' current and composed entirely of organic or resistive material.

The spud 15, as shown in Figs. 2, 3, 4 and 1 5, consists of a disk 18 having short radiating arms 19.` the extren'iev radius ot the spud being' substantially equal to or slightly less than the radius of the valve' disk and of the body. `When the spud is forced into the body, it forms a metal top surface to the silient material.

disk, leaving unsupported only short s`eg`- ments 2O ot the body material, but the circuinterence of tlie spud at 21 betiveen the j arms 19 is ot about the same' radius as the valve seat, and tlie stress transmitted to the body ot organic material is only that of i Then the disk is plaiced iii compression.

Copies 'f this patent may lie obtained flor :tive eetsi each,

the box 11 and the valve closed, the central applied to the'valve stem and distributes it y over the body of the disk 17-soth the disk is compressed but not subject t0 transverse ticityrof the body material being so much greater .than that of the metall,` that Vthe tr'a`iisifeis`e`stressfisI taken' up entirely by the metal. Theresili'ent portion of the body is coiiipressed between' the seating surface' and the spud, forming a tifgl'it closure of the y valve,- Which is not subject, to decomposition or' abrasion by the chemical properties ot the Water to which I have referred, thebody portieri'- bein'g' so placed and disposed' that it receives theimpact of the liquid at all' timesv as the valve is opened and closed, proitecting the metal spud.

AI have thus described in mii'iute detail a than in their limiting sense, and the teaii'iventi'on, the scope of Wl'iich defined in' g the'` claims.

I claimvalve: disk Consisting of metal spudinv the form of a disk Witlrs'hort radial arms, a body er bottom disk of resilient, re;

sistive material ot substantially the saine i diameter, the spu'd being eii'ibed'd'ed' in' the body, forming' a valve disk Withl al in etal top and a bottom face entirely ot resistive', re-

Signed by me at VVilliamspoi-t, Pa., this niet day of June' i912. Y i Y GEORGE HART.

mios K. BROWN, VAJTR Haier.-

Wasiiingtoii, DI C.

addressing die Commissioner of.Piateijfts,V

55 stress to any considerable extent, the elasn 

